Rondo was injured Wednesday night when he took a hard foul from Toronto's Linas Kleiza while going to the basket. An MRI was negative.
Rivers says Rondo is hoping to be back for Sunday's game against the Washington Wizards. But the coach isn't putting a timetable on Rondo's return.
Rondo is averaging 15 points, 9.4 assists and 5.1 rebounds this season.